Means for returning condensation-water to the generator.



MEANS FOR RETURNING 00 W. WECKERLE. NDENSATION WATER APPLIOATIDN'PILED 0GT.1 5, 1906.

PATENTED JAN- 22, 1907.

TO THE GENERATOR.

1H: NORRIS PETERS co, lmsmNcw/v. b. c

UNTTED STATES PATENT OFFICE.

' WILHELM 'WECKERLE, OF STUTTGART, GERMANY.

MEANS FOR RETURNING CONDENSATlON-WATER TO THE GENERATOR.

Specification of Letters Patent.

Patented Jan. 22, 1907.

Application filed October 15, 1906. eria1 N0 338,990,

object being to utilize the difference of steampressures in the generator and the cooker to operate said reversing-valve through the intervention of an internal float adapted to be of two cylinders c and s.

lifted by the condensation-water. This is effected by causing the live steam after it has performed its work in the reversing-valve to join the steam in the cooker. I

Steam-cookers have heretofore been provided with means for returning the condensation-water to the steam-generator, and my invention comprises only the aforesaid reversing-valve and the manner of operating the'same.

The invention will be readily understood by reference to the accompanying drawings, in which- Figure 1 is an elevation, partly in section, of the general arrangement of my improved steam-cooker. Fig. 2 is a vertical section of the reversing-valve.

Between the cooker a and steam-generator b I place the reversing-valve, which consists The lower and larger cylinder 0 receives the condensationwater and is provided with a piston d and a float f, adapted to slide on a central vertical rod 6. The rod 6 projects with its upper end in the hollow piston-rod g and.has a longitudinal slot h, in which a pin i of the float f can slide up and down.

- The lower end of the rod 6 is pivoted to a two-armed lever 76, whose external arm I is pivotally joined to a piston m by the pistonrod n. The piston m can slide in its steambox 0, which receives live steam from the generator I) through a branch pipe p. The steam-box 0 has a port (1, which leads to the back of the piston d, and a port 7", leading rearwardly non-return valve.

to the rear of the piston t, fixed to the upper end of the piston-rod g and sliding in the small cylinder 8. A further port it leads from the box 0 to the front of the piston 25.

Moreover, the said box has ports v communicating with its upper and lower end, leading .by a pipe w into the steam-space of the cooker a. The main steam-pipe at from the generator b supplies the piston-valvem through the branch pipe p, as stated, and also passes through a pressure-reducing valve y direct into the steam-space of the cooker.

The action is as follows: The generator I) may have a normal steam-pressure of eight atmospheres, which pressure would be reduced by the valve y to two atmospheres before the steam can enter the steam-space of the cooker a. The condensation-water passes awaythrough the pipe 2 into the lower end of the cylinder 0, Where it forces the float f upward, the pin i therefore sliding along the slot h of the rod 6. When the pin 4; reaches the upper end of the slot h, it lifts the rod 6, which latter operates the two-armed lever and causes the rod 71 to move the piston m into the lower position, as shown at Fig. 2. Steam now enters from the pipe p through the port 1" to the rear of the piston 25, as well as through the port 9 behind the piston d, and causes both pistons to descend, with the re sult that the condensation-water is ejected from the cylinder 0 through a forwardly-situated non-return valveinto the generator, its passage with the cooker being barred by a Shortly before the completion of the stroke of the two pistons d and t' the latter strikes the upper extremity of the rod 6 and depresses the same, thus causing the piston-valve m to be reversed and allow steam to enter the port it and lift the piston t and its connected piston d. The float f remains at the bottom of the chamber 0 until it is again forced upward by fresh condensation.

I claim In steam-cookers, the arrangement of an automatic reversing-valve between the cooker and the steam-generator and comprisingin combination a large cylinder, a piston, an outwardly-projecting piston-rod, a small piston at the end a float in the large cylinder, an

internal rod operated by said float in one diand ports for alternately brin ing said cylinrection and bysaid small piston in the oppoders in communication With t e steam-space site direction, a two-armed lever pivoted to of the cooker.

said rod, an external rod pivoted to the lever, WILHELM WECKERLE. a piston-valve mounted on said external rod Witnesses: and a valve-box containing said piston-valve ADALBERT Ii. BnUER, with ports therefrom into the two cylinders, ERNST ENTENMANN. 

